Air-chambered stuffing-box for spiral pumps or coils.



. G. BRAMANTI-MATTEI & P. BEL'IRAMO. I'AIB OHAMBHRED STUFFING BOX- POB SB IP-ALJPUMPS 0B OOILS.

APPLICATION FILED APLZI, 1911.

Patented Mar. 26, 1912.

I NV EN ORS! WHN Essesii UNITED STATES PATENT oFF IoE.

GIUSEPPE BRAMANTI-MATTEI AND PAOLO BELTRAMQ, 0F "SERAVEZZA, ITALY.

AIR-QHAMBERIED STUFFING-BOX FOR SPIRAL PUMPS OR ooILs.

To all wlwm it may concern:

Be it known that we, GIUSEPPE BRAMANTI- MATTEI and PAoLo BELTRAMO, mechanical engineers, residing both at Seravezza, Italy, have invented certain new and useful [Improvements in Air-chambered Stulling- Boxes for Spiral Pumps or Coils, of which the following is a specification.

The known spiral pumps or coils for elevating liquids, and especially slimy or sandy liquids comprise a cylindrical coiled tubing keyed ona rotating horizontal tube and'connected at one endby a suitable tubing to the said axial tube, the said coil being immerged up to a variable level in the liquid to be elevated, which is contained in a tank. On rotating the apparatus, thecoil with its free end alternately is immerged in the liquid and rotates through the air thus alternately admitting a given quantity of liquid or air which latter in the Various revolutions of the coil is compressed up to a pressure sufiicient to elevate the liquid to the desired height.

At the end of the rotary axial tube the liquid .and air are admitted to a fixed tube, the connection between the said twotubes being hitherto, obtained by an ordinary stufling-box. hen dealing, however, with unclean liquids such as sandy water, for instance a mixture of water and quartz sand such as used in stone sawing plants, the pres of being keyed to a horizontal shaft the coil was keyed to an inclined tube extended to the desired height, thus the whole tube'being rotated, and the stuffing box done away with. However, the additional weight of the rotary tube and additional supports as compared with that of the fixed tube, the greater space required, and the greater power needed for driving-the additional weight of rotating masses are no immaterial disadvantages in sawmills. The best course to be adoptedwould therefore be to revert.

to stullin -boxes if wearing could be avoided. The o ject of our present invention is therefore to provide an improved air chambered stalling-box for coil pumps by which wearing-off is prevented.

In order that our said invention may be more clearly understood we have illustrated Specification of Letters'l'atent.

Patented Mar. 26, 1912.

Application filed April 21, 1911. Serial No. 622,484.

same by way of example in the annexed drawing wherein;

Figure 1 is an upper view showing at the left a coil pump of known construction and at the right our improved air chambered stuffing-box connecting the rotary shaft to the fixed tube, and F 1g. 2 a vertical longitudinal section of the above.

In the said figures, a is "the ordinary coil or spiral pump keyed on the known rotary tube or hollow shaft -bconnected to a stufling-box C forming part of a tight closing funnel bottomed cast iron or metal casing I). having an opening E in its bottom, connecting it to the rising tube I. Tube b passes through the stufiing-box .C- and extends into the interior of casing -D toward the her I) and collected at the outlet -l* of the funnel shaped bottom of chamber -D, whereupon a certain quantity of air compressed by the rotating coil /1 is admited to chamber -l) and forces the first quanti y of liquid into the rising tube I, whereupon the said two successive admissions of liquid and air to chamber -l) are repeated, and so on, so as to obtain at the .end of the rising tube I an alternate disclnirge of liquid and air, the compressed air in the chamber preventing the liquid from rising up to the level of the stulling-box which'lattcr therefore has only the function to keep the air in chamber -l) under pressure.

t lling. now fully described our said invention and they manner in which the same is to be performed, what we claim and desire to secure by Letters Patent of the United States is:

1., In a pump of the character described, in combination, a rotatable tube, a coil supported, thereby and rotatabletherewith, one

end of said coil being free and the other end of said coil-communicating with said tube, a rising tube operatively comniunicab ing with. said rotatable tube, and an air of said coil communicating with said tube,

a risin tube operatively communicating with said rotatable tube, and a casing interposed between said tubes, said rotatable tube communicating with said casing at a point above that which said rising tube communicates with said casing.

3. In a pump of the character described, in combination, a rotatable tube, a coil supported thereby and rotatable therewith, one

end of said coil being free and the other end of said COll communicating with said tube, a casing, 21 stufling box ad acent the upper part thereof, said rotatable tube extending names 'to this specification in the presence of I two Witnesses.

' GIUSEPPE BRAMANTI-IVLATTEI.

PAOLO BELTRAMO.

Witnesses ARTURO LANGUINETTI, GIUSEPPE Vmscoma. 

